Uninstall Help

When I went to download Avast Antivirus I mistakenly clicked on the Pro Version and installed it first. When I noticed the problem I tried to uninstall the Pro version so I could download the Home version and use it. When I try to uninstall it from the Add/Remove Programs window it gives me an error that says: Error loading C:\PROGRA~1\ALWILS~1\Avast4\Setup\setiface.dll”. The specified module could not be found. How do I uninstall the Pro Version and install the Home Version? ???

PS. I have tried to install the home version over the pro version without uninstalling anything. That does not work either. A bar comes up, goes to 100% then goes off.

Normally, turning Pro version to Home can simply be done by entering a Home-version serial number - the Pro modules will automatically be uninstalled.
In this case, however, it sounds like installation is corrupted somehow… can you select “Repair” from the Control Panel?

last resort is to try avast uninstall utility…

http://www.avast.com/i_idt_1336.html